Memoirs of the secret services of John Macky, esq., during the reigns of King William, Queen Anne, and King George I. London, 1733
Great book written by a Scottish spy in 18th century you can do a search inside the book with the words like black or brown
https://archive.org/stream/memoirssecretse00mackgoog#page/n12/mode/2up/search/brown
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